Member-joining device

ABSTRACT

A member-joining device with which, when pipe members etc. are fixed to each other, a sufficient fastening force can be obtained even if the members have thin wall thickness. Member-joining device  8  has a first bridge member, a second bridge member and drawing means  6.  First bridge member  81  joins first member  5  having a pair of opposing walls  53, 53  and a second member  31  having a pair of opposing walls  311, 311  and is spanned at a predetermined position of the first member between the opposing walls  53, 53.  Second bridge member  82  is spanned at a predetermined position of second member  31  between the opposing walls  311, 311.  Drawing means  6  draws first bridge member  81  and second bridge member  82  in the direction where both members are closer to each other. Accordingly, first member  5  and second member  31  are pressed and joined to each other by a drawing force of drawing means  6.

TECHNICAL FIELD

The present invention relates to a member-joining device which is usedto join each member having a pair of opposing walls of such as pipemembers and channel members.

BACKGROUND ART

Traditionally, for instance, when each hollow member such as a pipemember is fastened by such as a screw, each separated outer wall of thehollow members overlapped with a different outer size is fastened asdisclosed in Japanese Laid Open Patent Publication H5-146316.

Or when the outer sizes of each hollow member are the same, an innermember which is inserted into one of the hollow members from anotherhollow member is projected, and the outer wall of one of the hollowmembers and the inner member of the other hollow member are joined at aninserted position.

However, when each separated wall is fastened as disclosed in the formerinstance, it is different from the case when each coherent wall isfastened, and it cannot be fastened over strength in the direction ofwall thickness because the fastening force acts to cave the wall in thethickness direction. Therefore when the thickness of the wall is thin,secured firming of each member may be difficult because sufficientfastening force cannot be obtained. Further there may be more or less abacklash in the joining status due to a difference between the screwhole and the screw and a process deviation of the screw hole.

On the other hand, in the latter instance, in addition to the samedefect as more or less backlash in the joining status, according to thisstatus, a defect may take place that a favorable joining status in whicheach end face of hollow member is joined face to face cannot be obtained(specifically there is an unexpected gap between the joining portion ofeach end face).

DISCLOSURE OF THE INVENTION

The present invention relates to providing a member-joining device whichallows each end face of pipe members to be securely and coherentlyjoined with sufficient fastening force and without backlash according tonecessity when such as pipe members are fixed to each other even if itswall thickness is thin.

Specifically the member-joining device according to the presentinvention which is joining the first member having a pair of opposingwalls and the second member having a pair of opposing walls comprisesthe first bridge member which is spanning or intervening betweenopposing walls at a predetermined position of the first member, thesecond bridge member which is spanning or intervening between opposingwalls at a predetermined position of the second member, a drawing meansdraws the first bridge member and the second bridge member in thedirection where both members are closer to each other; wherein the firstmember and the second member are pressed and joined by the drawing meansand the drawing force.

Thus when the first member and the second member are drawn with thedrawing means, the force acts along the face direction of opposing wallsthrough the first bridge member and the second bridge member.Accordingly, the drawing force with the drawing means does not act tocave the wall in the direction of thickness and the members can bepressed and fixed to each other even if the first and second member aremade of a thin material in comparison with the traditional joiningmeans. Wherein, each opposing wall is not limited to be in parallel andfor instance may include facing walls of such as a round pipe. Furtherthe drawing force becomes a pressing force and therefore the factorwhich may cause a backlash can be eliminated because the drawing forceacts along the face board direction of opposing walls and the membersare pressed and joined to each other by such force.

Further, the member-joining device of the invention comprising aposition determining means projected in the predetermined position ofthe first member, the first fixing portion having a screw hole installedin the predetermined position of the second member, the second fixingportion having a hole for insertion of screw installed in the projectionportion of the position determining means and a drawing means whichdraws the first fixing portion and the second fixing portion by screwingtogether joins the first member and the second member; wherein a lineconnecting the first fixing portion and the second fixing is set by thedrawing means in which a fractional force generated slides the firstmember and the second member along their contacting face, and a positiondetermination action of the first member and the second member iscarried out by the position determining means restricting the slidingmovement.

Accordingly, the first member and the second member are closelycontacted to each other by the drawing force, a fractional force in thesliding direction along the contact face between the first member andthe second member is generated, and then the position determining meansrestricts the sliding movement at the predetermined position and theposition determination action of the first member and the second membercan be securely carried out. Thus, the first member and the secondmember can be securely coherently joined at the predetermined position.Further, the screw hole can be set as longer by installing the firstfixing portion to the projection portion because the projection portionof the position determining means can be thicker. Therefore the drawingforce of the drawing means according to the screwing of the screw can bemore secured.

Further, the first member and the second member can have a displacementprevention means corresponding to the force at almost right angles tothe sliding force, and the displacement prevention means can control thedisplacement action at almost right angles to the sliding force, and theposition determination action of the first member and the second membercan be securely carried out. Thus, the first member and the secondmember can be securely coherently joined at the predetermined position.

When each adjacent second member is joined through the first member, itis preferable in the first member that the first member comprises a pairof contact faces facing reversely to each other which are slightlybeveled in the closing direction to each other in downward direction toincrease reasonably the joining strength between the second members andto bend them at the connection; wherein the end face of the secondmember are pressed to the contact face to join the second member.

To be able to determine the position at right angles direction in thelongitudinal direction in the connection of the first member and thesecond member, the second member is a pipe member; the first membercomprises a pipe-like outer member having a coinciding cross sectionoutline form with the second member and an inner member projecting awayfrom each end face of the outer member; wherein each end face of theouter member is the contact face; and preferably the first member andthe second member are joining by inserting the projecting portion to theend face of the second member. Accordingly, the inner member performs asthe position determining means and the displacement preventing means andthe contact face and the end face of both members can be joined securelywithout a gap.

As a specific way to perform securely connection and the positiondetermination, if the line connecting the first bridge member and thesecond bridge member, or the first fixed portion and the second fixedportion is set not in right angles to the contact face in the side viewand the divisional force is generated to slide the contact face and theend face by the drawing force, the outer face of the inner member andthe inner face of the second member are closely contacted by the slidingforce and the action for position determination between the first memberand the second member can be performed.

The first member and the second member are installed as their connectiondirection almost coincides with their horizontal direction, the lineconnecting the first bridge member installed in the first member and thesecond bridge member installed in each second member positioning at itsboth sides is preferably set as like /\ shape in the side view in orderto adequately carry out an operation for the drawing means.

The line with like /\ shape in the side view is preferably set in thelower half portion of up-and-down direction of the first member and thesecond member in order to effectively prevent opening the betweenness ofthe first member and the second member underside of the connectionboundary region due to their own weight or uploaded weight.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a total perspective view illustrating the table according toan implementation of one of the embodiments of the invention.

FIG. 2 is a total side view illustrating the table according to animplementation of one of the embodiments of the invention.

FIG. 3 is a total bottom view illustrating the table according to animplementation of one of the embodiments of the invention.

FIG. 4 is a total side view illustrating a supporting structure for thetop board according to an implementation of one of the embodiments ofthe invention.

FIG. 5 is an exploded perspective view of a staple portion illustratingthe connection portion according to an implementation of one of theembodiments of the invention.

FIG. 6 is a side view of a staple portion illustrating the connectionportion according to one of the embodiments of the embodiments of theinvention.

FIG. 7 is a cross section view illustrating the inside structure of Aregion in FIG. 3.

FIG. 8 is an exploded perspective view of a staple portion illustratingconnection structure of the main frame and the supporting frame.

FIG. 9 is a perspective view of a staple portion (A) and a cross sectionview (B) illustrating the connection portion according to animplementation of the other embodiment of the invention.

FIG. 10 is a perspective view of a staple portion according to animplementation of the other embodiment of the invention.

FIG. 11 is a perspective view of a staple portion according to animplementation of the alternated embodiment of the invention.

FIG. 12 is a perspective view of a staple portion illustrating thealternated embodiment.

FIG. 13 is a perspective view of a staple portion according to animplementation of other alternated embodiment of the invention.

FIG. 14 is a perspective view of a staple portion according to animplementation of other alternated embodiment of the invention.

FIG. 15 is a perspective view of a staple portion according to animplementation of other alternated embodiment of the invention.

FIG. 16 is a cross section view of a staple portion according to animplementation of the other alternated embodiment of the invention.

FIG. 17 is a cross section view of a staple portion according to animplementation of the other alternated embodiment of the invention.

FIG. 18 is a cross section view of a staple portion according to animplementation of the other alternated embodiment of the invention.

FIG. 19 is a perspective view of a staple portion according to animplementation of the other alternated embodiment of the invention.

FIG. 20 is a perspective view of a staple portion according to animplementation of the other alternated embodiment of the invention.

FIG. 21 is a perspective view of a staple portion according to animplementation of the other alternated embodiment of the invention.

FIG. 22 is a cross section view of a staple portion according to animplementation of the other alternated embodiment of the invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The inventors describe the implementation of the present inventionreferring to figures.

A member-joining device relating to an implementation of the inventionis applied to tables illustrated in such as FIG. 1. Table 1 comprisestop board 2, main frame 3 mainly supporting top board 2, and leg 4supporting main frame 3 at its both ends.

Referring to FIG. 1, FIG. 2 and FIG. 3, top board 2 is formed byattaching a pair of top board element 21 having a rectangular shape inthe depth direction and setting plural elements board to board along thelongitudinal direction of top board element 21. Side frame 22 andsupporting frame 23 are installed to each top board element 21 toincrease strength. Side frame 22 installed in the inside within acertain distance from longer side of board element 21 and along one oflonger sides of board element 21 is a square shape pipe. Pluralsupporting frame 23 (3 frames according to the embodiment of theinvention) are installed between each side frame 22 and is a squareshape pipe which is extending at right angles to the longitudinaldirection of each top board element 21 to join one pair of top boardelements 21.

Main frame 3 extending along longitudinal direction of top board 2comprises linearly connected plural main frame element 31 is a squarepipe having an oblong structure. According to an embodiment of theinvention, each one of main frames 3 is installed in boundary proximityof top board element 21 attaching each other and all in all, pluralframes (two) are installed in parallel at the center of top board 2.Further, spacer frame 32 is installed intermittently in necessaryposition between main frames 3 to increase strength and set the distancein between. Main frame element 31 has almost the same length as thelongitudinal length of top board element 21 and is installedcorrespondently under each top board element 21.

Leg 4 is installed at both ends of top board 2 and each leg 4 comprisesa pair of leg elements 41 like a square pipe, horizontal member 42 likea square pipe connecting leg element 41 to each other at its top end andan adjuster (not illustrated in FIG.) installed under face of legelement 41. The end portion of main frame 3 is connected to the insideface of the center portion of horizontal leg 42 and leg 4 and main frame3 form top board supporting structure 7 which can stand aloneindependently.

Further, the length of table 1 can be changed by increasing ordecreasing the number of main frame element 31 and top board element 21.

Further, referring to FIG. 4, under the condition where top board 2 isnot loaded on supporting structure 7 of table 1, and specifically underthe condition where none or almost none of weight of top board is added,it is composed of as evagination condition in which the center portionof top board supporting face 3 a in main frame 3 is evaginating; and itis composed of as top board supporting face 3 a is under one facecondition or almost one face condition Q because of flexure of mainframe 3 due to the weight under the weighted condition where top board 2is loaded on top board supporting structure 7.

Specifically to set main frame under evaginating condition P connectionportion between adjacent main frame elements 31 is bent, wherein mainframe is forming a part of partial polygon. Specifically referring toFIG. 5, FIG. 6 and FIG. 7, adjacent main frame element 31 is connectedto each other through connection member 5 in the connection portion.

Connection member 5 comprises pipe-like outer member 51 coinciding withthe shape of the cross section outline of main frame element 31 andchannel-like inner member inserted to the inner periphery of outermember 51 and connected by such as welding which is opening upward.Inner member 52 is projecting outward from each end face 51 a of outermember 51, its thickness size is larger than the thickness size of outermember 51 to secure rigidity and strength in order to connect main frameelement 31 each other. Outer member 51 plays a role as contact face 51 apressing end face 31 a of main frame element 31 to each end face inwhich each contact face 51 a facing reversely to each other which isslightly beveled in the closing direction to each other in downwarddirection. And the projected portion of inner member 52 is inserted intothe end portion of main frame element 31 and is bent at the positionwhere end face 31 a of main frame element 31 is contacted to contactface 51 a. Further end face 31 a of main frame element 31 is set asperpendicular to its longitudinal direction.

Further the projected portion of inner member 52 is inserted to the endportion of main frame element 31 without a jounce at least in the widthdirection.

Table 1 is built into a structure as follows.

Firstly main frame 3 is built by connecting main frame element 31,horizontal member 42 of leg 4 is installed to each end portion of mainframe 3, and independently stand alone top board supporting structure 7is formed. Referring to FIG. 4, under such condition, the center portionof top board supporting face 3 a in main frame 3 is evaginationcondition P evaginating above both end portions.

Top board 21 is loaded and fixed above top board supporting structure 7.Side frame 22 and supporting frame 23 are installed to top board element21 at an appropriate timing. When top board element 21 is uploaded, avery little gap should be formed between adjacent top board elements 21.Main frame 3 is bent with total weight of top board element 21,specifically, loaded top board 2, and top board supporting face 3 a ofmain frame 3 is under almost one face condition or one face condition Q,and accordingly top board face 2 a becomes flat. Further, at that timethe gap between top board elements 21 is disappeared and top boardelements 21 closely contacts to each other.

According to an embodiment of the invention, member-joining device 8 isused to connect connection member 5 which is the first member and mainframe element 31 which is the second member.

Member-joining device 8 comprises first bridge member 81 spanningopposing walls 53, 53 opposing in the depth direction at thepredetermined position S1 of connection member 5, second bridge member82 spanning opposing walls 311, 311 opposing in the depth direction atthe predetermined position S2 of main frame element 31, and drawingmeans 6 drawing in the direction where first bridge member 81 and secondbridge member 82 are close to each other; wherein drawing force based ondrawing means 6 presses and connects contact face 51 a of connectionmember 5 and end face of main frame element 31.

First bridge member 81 has a shape as a part of column is cut verticallywith plane and is like solid-core block which forms column face portion81 a and plane portion 81 b in periphery. Screw hole 81 c is opening andpenetrating to the center of plane portion 81 b which is at right anglesto its axis.

Second bridge member 82 has almost the same shape as first bridge member81 and screw hole 82 c instead of screw hole 81 c.

Both ends of each bridge member 81, 82 are being supported withpenetrating hole 91, 92 installed in each opposing wall 53, 311.Penetrating hole 91, 92 have a shape as bridge member 81, 82 can beinserted with almost no gap, and plane portion 81 b, 82 b of each bridgemember 81, 82 are in right angles to drawing direction and support themreversely facing to each other.

Drawing means 6 can draw each bridge member 81, 82 by inserting screw Bto screw hole 82 c from plane portion 82 b and screwing together screw Bto screw hole 81 c.

Further, according to an embodiment of the invention, a line in the sideview connecting each predetermined position S1, S2 is set, specificallyas screw forwarding direction is not in right angles to contact face 51a, to generate divisional force which slides contact face 51 a and endface 31 a with the drawing force. And referring to FIG. 5, outerperiphery downward face 52 x of inner member 52 and inner peripheralupward face 31 x of main frame element 31 are closely contacted, andposition determination of up-and-down direction in main frame element 31and connection member 5 is carried out. The line above has a /\ likeshape in the side view and is in the lower half portion of up-and-downdirection in connection member 5 and main frame element 31.

Further, the direction of screw B coincides with the direction of thedrawing above and its head portion is set as in the obliquely downwardposition, opening portion 31 c is set as opening downward under face ofend portion of main frame element 31, into which a tool such a screwdriver is inserted to tighten and loosen screw B, and runout 52 c isinstalled in the outer peripheral bottom wall portion of inner member52. Runout 52 c is not always necessary if projection of inner member 52is small.

In the tightened status, screw B inserted and screwed from openingportion 31 c is buried completely in main frame element 31 andconnection member 5, and screw B is invisible al least from the sidedirection or the top direction.

Further according to an embodiment of the invention, as well as abovemember-joining device 8A is used to join main frame element 3 andsupporting frame 23 in the connection portion.

Referring to FIG. 8, member-joining device 8A as the first member, firstbridge member 81A spanning between oppositely standing walls 231, 231 ofsupporting frame 23, and second bridge member 82A spanning betweenoppositely standing walls 311, 311 of main frame element 3 are drawn bydrawing means 6A utilizing screw B1, and the upper face of main frameelement 3 and the under face of supporting frame 23 are pressed andjoined.

Regarding first bridge member 81A and second bridge member 82A, eventhough there is some difference in scale, they have the same form and anexplanation is omitted.

Penetrating holes 91A, 92A supporting first bridge members 81A, 82A anddrawing means 6A have the same form and an explanation is omitted.

Further, screw forwarding direction is perpendicular and has rightangles to the connection face (upper face of main frame element 3 andunder face of supporting frame 23) in member-joining device 8A.

Further, insertion hole 23 c to which screw B1 is inserted is installedto supporting frame 23, and in connection status, screw B1 inserted frominsertion hole 23 c and screwed is completely buried in main frameelement 3 and supporting frame 23 and invisible.

According to an embodiment of the invention, when drawing means 6 and 6Adraw connection member 5 and main frame element 31, or supporting frame23 and main frame element 3, the force works along the plane boarddirection of opposing walls 53, 311, 231 through first bridge members81, 81A, and second bridge members 82, 82A. Accordingly, drawing forcebased on drawing means 6, 6A does not work to crave the wall in thethickness direction and therefore even if main frame element 31 isrelatively thin material, the members can be pressed and fixedsufficiently to each other in comparison with traditional connectionmeans.

Further the number of parts can be reduced because one of bridge members81, 81 A, 82, 82A plays a role as a nut block.

Further, the present invention is not limited to the embodiments of theinvention.

For instance, one common bridge member to two main frames can span. Ifsuch common bridge member to plural members is used, simplification ofstructure farther can be carried out. Further the bridge member is fixedto main frame and the spacer frame above can be eliminated. Further bothend of the bridge member can be fixed to opposing wall by such aswelding and the bridge member can be set between opposing walls.

Of course various alternation of such as shape of bridge member can becan-led out, and any structure can be accepted for the first member andthe second member if it has at least opposing walls in such aschannel-like members.

According to the invention, if one or none of the first member and thesecond member has an opposing wall or even when the opposing wall is notutilized nevertheless they have an opposing wall, an effectivemember-joining structure can be provided.

For instance, referring to FIG. 9, according to an Implementation ofother embodiment of the invention, first horizontal member 42 as thefirst member and second horizontal member 31 as the second member areconnected through the connection member 50 as member-joining device 8B.

Referring to FIG. 9(A) and FIG. 9(B), connection member 50 is installedto opening portion 421 in the predetermined position of first horizontalmember 42, and comprises internal backing portion 54 in first horizontalmember 42, and projection portion 55 working as position determiningmeans and displacement prevention means is projected to outside byclosely penetrating opening portion 421 of first horizontal member 42from backing portion 54. Outer size in the width direction of projectionportion 55 is set approximately as it can be closely insertedcorresponding to inner size in the width direction of second horizontalmember 31 connected to first horizontal member 42, and inner size ofup-and-down direction is set approximately as it can be loosely insertedto corresponding to inner size of up-and-down direction of secondhorizontal member 31 connected to first horizontal member 42. Firstfixing portion 81B having threaded screw hole is formed at the obliquelyupward position in the reverse projection direction from predeterminedS1 of connection member 50, specifically the projection end face of theprojection portion and second fixing portion 82B is formed by spanningthe bridge member having screw insertion hole as well as the embodimentabove between the oppositely standing walls of second horizontal member31 at the position corresponding to first fixing portion 81B where islower position than predetermined position S2 of second horizontalmember 31, specifically the fixing portion of first horizontal member42.

Then both horizontal members 4231 are connected to each other by drawingforce z based on drawing means 6B; wherein bolt-like drawing means 6Bdraws first fixing portion 81B and second fixing portion 82B closer toeach other; and wherein the standing wall of first horizontal member 42is contact face 42 a of the invention and end face 31 a of secondhorizontal member 31 is contact face 31 a of the invention.

In such case, according to an embodiment of the invention, a setting ofa line connecting S1, S2 in the side view based on position relationshipbetween first fixing portion 81B and second fixing portion 82B,specifically screw forwarding direction, is carried out not to be atright angles to contact face 42 a. Accordingly, not only drawing force zworks as force y pressing end face 31 a of second horizontal member 31to the standing wall of first horizontal member 42, but also divisionalforce x to slide second horizontal member 31 against first horizontalmember 42 along contact face 42 a and contact face 31 a is generated.And outer periphery downward face 55 a of projection portion 55 works asa position determining means to control sliding over the range withslide divisional force x by contacting to inner upward face 31 b ofsecond horizontal member 31, and also it can work as a displacementprevention means to control displacement in the width direction when thestanding face of projection portion 55 in the width direction isinserted to the inner wall of the standing wall of second horizontalmember 31. Further the drawing force of drawing means 6B with screwingthe screw can be more secured because the threaded screw hole can be setas longer by installing threaded screw-like first fixing portion 81B toconnection member 50 comprising projection portion 55 which can beeasily set as thicker.

Further the direction of screw B is coinciding with the drawingdirection, the head portion is set in obliquely downward position, andopening portion 311 opening downward is installed under the face ofsecond horizontal member 31 for insertion of a tool such as a screwdriver for tightening and loosening screw B.

In the connected status, screw B which is inserted from opening portion311 and screwed is buried completely in first horizontal member 42 andsecond horizontal member 31, and Screw B is invisible at least from sideor top direction.

The embodiment above can be implemented where opening portion 421 andconnection member 50 can be installed.

Further referring to a perspective view illustrated in FIG. 10, the formof second fixing portion 82B installed in second member 31 can be ascolumn-like bridge member 82B is penetrated by forming circular holebetween oppositely standing walls 231, 231. Further referring to FIG.11, square column-like spanning member 811 can be installed as thesecond fixing portion. Referring to the same figure, bridge member 811is an embodiment in which it is fixed between oppositely standing wallsof second member 310 by welding and is not penetrating the oppositelystanding walls.

Further, referring to FIG. 12, a bridge member spans between oppositelystanding walls 314, 314 which plane board 313 bent as ] like-shape iscomprising, and plane board 313 is inserted into square pipe-like secondmember 310 as the second member and first fixing member 812 can beinstalled to square pipe-like member 310 adhered to the inner wall bysuch as welding.

Accordingly, the form can be selected and applied in accordance withadhesive member and position, and then the application area of theembodiment of the invention can be farther expanded.

Further, referring to FIG. 13, when two square pipe-like members 315,316 are connected, projection portion 318 can be functionalized as adisplacement prevention means of the invention by utilizing space 317 ain upper portion of such as partition member 317 at the cross section offirst member 315, forming cross section-like projection portion 318corresponding to space 317 a to second member 316, and inserting intospace 317 a. Further if such connection form is used as the positiondetermining means and the displacement prevention means according to anembodiment of the invention, both members can be more adequately joined.Accordingly, the member-joining device according to an embodiment of theinvention can be applied more adequately and more widely if it is usedtogether with the member connecting means.

Further, referring to FIG. 14, according to an alternative embodiment ofthe embodiment of the invention, horizontal member 331 as the secondmember can be connected by externally installing rectangularparallelepiped connection member 350B to predetermined position S1 ofcolumn support 342 as the first member using such as welding. Connectionmember 50B of which main body, as is, can be inserted end portion 331 aof horizontal member 331 as well as projection portion 55 of connectionmember 50 works as a position determining means and a displacementprevention means. Connection member 350B comprises threaded screwhole-like fixing portion 381C arranged in beveled direction which isinstalled in predetermined position S1 and shows the same action andeffect as connection device 50; wherein first fixing portion 381C andsecond fixing portion 382C installed to horizontal member 31 as well asconnection member 50 above are connected by drawing with drawing meanswhich is not illustrated in figure.

Accordingly, in addition to the action and the effect of connectiondevice 50, for instance, when space for insertion of such as backlashmember in column support 342 is insufficient, an insertion of othermember is impossible and horizontal member 331 is connected to columnsupport 342 from plural directions illustrated in the same figure, itcan be especially adequately applied.

Further referring to FIG. 15, according to other implementation of theembodiment of the invention, horizontal member 431 is connected in whicha cap installed to the top end portion of column support 442 as thefirst element is used as connection element 450C. Connection element450C comprises threaded screw hole-like first fixing portion 481Darranged in beveled direction projection portion 455 projected from themain body 451 and upper face portion 456 which is flat plate having thesame form as the end face of upper end portion of column support 442 inpredetermined position of main body 451. When connection member 450 c isinstalled to column support 442, upper face portion 456 of connectionmember 450C is installed to the end portion of column support 442 whileincorporating the main body, and then after connection member 450C ismoved toward first opening portion 423 installed in predeterminedposition S1 of column support 442 to project projection portion 455 tooutside from second opening portion 423 installed in column support 442.On the other hand as well as each embodiment above, a bridge memberworking as the second fixing portion is spanned between oppositelystanding walls of horizontal member 431 as the second member beingconnected to column support 442. Drawing means such as screw insertedobliquely from the horizontal member, which is penetrating the bridgemember and column support 442 is screwed to first fixing portion 481Dand tightened to draw the gap between column support 442 and horizontalmember 431; wherein end face 431 a of horizontal member 431 can bepressed to external walls to adhere and fix.

And although also in this case the upward slide force in right angles tothe drawing direction is generated as a divisional force to columnsupport 442 in horizontal member 431, the upper face of the bottom wallof horizontal member 431 is stopped at the face of projection 455 facingdownward and projection 455 can be effectively functionalized asposition determining means of the invention.

Further referring to FIG. 16, according to other implementation of theembodiment of the invention, first horizontal member 510 as the firstmember and second horizontal member 520 is connected through connectionmember 500.

Connection member 500 is externally installed to first horizontal member510 by installing bolt b2 and nut n2 to the position of screw hole 511installed in the predetermined position of first horizontal member 510,and comprises intervening portion 510 being exposed to outside on theinstallation of second horizontal member 520 and projection portion 502working as a position determining means and a displacement preventingmeans according to the invention by being inserted into the inside ofsecond horizontal member 520 on the installation of second horizontalmember 520.

Outer size in the width direction of projection portion 502 is setapproximately as it can be closely inserted corresponding to the innersize in the width direction of second horizontal member 520, and innersize of the up-and-down direction is set approximately as it can beloosely inserted corresponding to the inner size of the up-and-downdirection of second horizontal member 520.

On the other hand, threaded screw hole-like first fixing portion 503 isinstalled in the position beveled obliquely downward toward the reverseprojection direction from projection end face of projection 502, upperboard 520 a Is caved like < shape in the side view in the predeterminedposition of upper board 520 a of second horizontal member 520 and secondfixing portion having screw penetrating hole 522 in caved slope 521 isinstalled.

When connection portion 500 and second horizontal member 520 contact toeach other, the face of intervening portion 501 is corresponding tocontact face 501 a of the invention and the end face of secondhorizontal member 520 is corresponding to contact face 520 t of theinvention.

When they are drawn to the direction where they are close to each otherusing bolt-like drawing means 6B, not only a force pressing contact face501 a to contact face 520 t works, but also sliding force allows contactface 520 t to slide downward along contact face 501 a is generated.Sliding action more than constant is controlled by which upper board 520a of horizontal member 520 contacts projection portion 502 with thesliding force and accordingly projection portion 502 works as a positiondetermining means. Accordingly first horizontal member 510 and secondhorizontal member 520 are connected to the predetermined positionthrough connection member 500.

Accordingly even if inside space of first horizontal member 510 isnarrow, second horizontal member 520 can be connected. Further the screwhole can be set as longer and therefore first fixing portion 503 is setin projection 502 because the projection portion can be set as thick.Accordingly the drawing force of drawing means 6B based on screwingscrew can be more secured. The position connecting second horizontalmember 520 can be easily set because processing on first horizontalmember 510 is only to make a screw hole. A connection angle betweenfirst horizontal member 510 and second horizontal member 520 can beadequately set by adequately adjusting the form of intervening portion501 because it is connected to first horizontal member 510 and secondhorizontal member 520 through connection member 500.

Further referring to FIG. 17, the device which can fix connection member500 b to first horizontal member 510 b is disclosed. Connection member500 b comprises engaging face 504 which can be engaged to rail groove513 in first horizontal member 510 b comprising rail groove 513extending in longitudinal direction in the side face connecting secondhorizontal member 520, in which first horizontal member 510 b andconnection member 500 b are fixed by engagement of engaging face 504with rail groove 513. Accordingly not only first horizontal member 510 band connection member 500 b can be securely connected, but also secondhorizontal member 520 can be connected to a desired position along railgroove 513.

Further referring to FIG. 18 illustrating connection member 500 c, thedevice comprising beveled projection end face 502 is illustrated inwhich drawing direction of drawing means 6B coincides with the directionwhich first fixing portion 503 c installed in connection member 500 c isfacing to. Accordingly second horizontal member 520 can be farthersecurely connected because screw hole can be set as farther longer.

Further FIG. 19 is a perspective view of a device comprising secondfixing portion 523 installed in second horizontal member 520 illustratedin FIG. 16 to FIG. 18. The device is composed of opening portion 520 bwhich is installed in upper board 520 a of second horizontal member 520and second fixing portion 523 which is formed by inserting fixing member521 a having penetrating screw hole 522. Accordingly a process performedto second horizontal member 520 is only to install opening portion 520 band therefore second horizontal member 520 can be easily connected toconnection member 500. Further referring to FIG. 20 the device comprisessimple rectangular opening portion 520 c installed in second horizontalmember 520, fixing member 521 b which was formed by bending therectangular plate member having penetrating screw hole 522 b is insertedto opening portion 520 c to install second fixing member 523 b.Accordingly a process performed to second horizontal member is only toopen opening portion 520 c and fixing member 521 b can be formed by onlybending a plate member, and therefore second fixing 523 b can be easilyinstalled.

Further referring to FIG. 21, second fixing portion 523 c is formed byforming two cuts which are in parallel each other in the longitudinaldirection in the predetermined position of second horizontal member 520and penetrating screw hole 522 c in →shape cave 521 c in side view whichwas produced by a press work. Accordingly connection can be carried outon such as connection member 500 without using a separate member tosecond horizontal member 520.

Further referring to FIG. 22, a device is composed of second fixingmember 523 d formed by welding fixing member 521 d having penetratingscrew hole 522 d, which is inserted to downward inside of secondhorizontal member 520 from opening portion 520 d formed in secondhorizontal member 520, to under plate 520 x of second horizontal member520. Accordingly fixing member 521 d contacts upper board 520 a ofsecond horizontal member 520 at upper portion and lower board 520 x ofsecond horizontal member 520 at lower portion. Accordingly the drawingforce to second horizontal member 520 can be worked effectively toconnect to such as connection member 500 because the drawing force ofdrawing means 6B to second horizontal member 520 can be separatelytransferred to upper board 520 a and lower board 520 x of secondhorizontal member 520.

Other composition can be implemented with various alternations withinthe scope of the invention.

INDUSTRIAL APPLICABILITY

According to the detail description of the invention, when the firstmember and the second member are drawn by a drawing means, the forceacts along the direction of board face of opposing walls through thefirst bridge member and the second bridge member. Accordingly even ifthe first member and the second member are relatively thin materials,the members can be sufficiently pressed and fixed to each other withoutcaving in the thickness direction by the drawing force due to thedrawing means in comparison with traditional connection means.

Further according to the invention, when the first member and the secondmember are drawn, a divisional force which slides the first member andthe second member along the contact face is generated by the force, andthe first member and the second member are coherent in closing directionwith the slide divisional force, and a position determination of slidingdirection along contact face of the first member and the second membercan be carried out. Specifically the drawing force by the drawing meansas is works to determine the position and position determination to twodirections can be effectively and efficiently carried out by oneoperation.

1. A member-joining device to connect a first member having a pair ofopposing walls and a second member having a pair of opposing walls,comprising: a first bridge member for spanning the gap or forintervening between the opposing walls of said first member at apredetermined position of said first member; a second bridge member forspanning the gap or for intervening between the opposing walls of saidsecond member at a predetermined position of said second member; and adrawing means for drawing the first bridge member and the second bridgemember in the direction where both are close to each other; wherein saidfirst member and said second member are pressed and connected by adrawing force based on said drawing means.
 2. A member-joining deviceaccording to claim 1, wherein said drawing means draws and tightens saidfirst bridge member and said second bridge member by utilizing screwforwarding mechanisms,
 3. A member-joining device according to claim 1comprising: wherein said drawing means draws said first bridge memberand said second bridge member together by penetrating a screw into apenetrating screw hole formed in either said first bridge member or saidsecond bridge member and screwing said screw into a threaded screw holeprovided in the other.
 4. A member-joining device according to claim 1,wherein said first member and said second member have a square pipeshape.
 5. A member-joining device according to claim 1 wherein onesecond members adjacent to one end of the first member and anothersecond member adjacent to the other end of the first member areconnected through the first member; each member opposes each other andhas a pair of slightly beveled contact face in the downwardly drawingdirection; and an end face of said second member is pressed to thecontact face of the first member to join the first and the secondmembers.
 6. A member-joining device according to claim 5, wherein saidsecond member is a pipe member; said first member has a pipe-like outermember having a cross sectional shape coinciding with said second memberand an inner member projecting outward from each end face of the outermember; the each end face is said contact face, and the projectionportion of said inner member is inserted into the end portion of thesecond member to connect the first member and the second membertogether.
 7. A member-joining device according to claim 6, wherein aline connecting between said first bridge member and said second bridgemember is not in right angles to said contact face from a side view; adividing force is generated by the drawing force to slide a contact faceand an end face; an outer peripheral face of said inner member and aninner peripheral face of said second member contact closely with thesliding force; and a position of said first member and said secondmember is determined.
 8. A member-joining device according to claim 7,wherein the first member and the second member engage in a directionwhich substantially coincides with a horizontal direction; and a linefrom the first bridge member provided towards one end of the firstmember to the second bridge member provided on the second memberadjacent to one end of the first member and another line from anotherfirst bridge member provided towards the other end of the first memberto another second bridge member provided on another second memberadjacent to the opposite end of the first member have a shape of thesides of a trapezoid from a side view.
 9. A member-joining deviceaccording to claim 8, wherein the lines having a shape of the sides of atrapezoid from the side view are in a lower half region of the verticaldirection of the first member and the second member.
 10. Amember-joining device to connect the first member and the second membercomprising: a position determining means for projecting in thepredetermined position of said first member; a first fixing portionhaving a screw hole provided on the projection portion of said positiondetermining means; a second fixing portion having a screw penetratinghole provided on the predetermined position of said second member; adrawing means for drawing the fixing portion and the second fixingportion by screwing a screw; wherein the drawing means sets a lineconnecting said first fixing portion and said second fixing portion sothat a divisional force to slide said first member and said secondmember along their contact face is generated by the drawing force; saidposition determining means restricts a sliding movement to effect theposition determining means.
 11. A member-joining device according toclaim 10, wherein at least one of said first member and said secondmember has a displacement prevention means corresponding to a force atsubstantially right angles to both closing force and sliding force,which restricts the displacement in the direction at substantially rightangles to both said closing force and said sliding force to determinethe position of said first member and said second member.
 12. Amember-joining device according to claim 11, wherein said second memberis a pipe member and said first member comprises an inner memberprojecting outward, and said inner member is said position determiningmeans and said displacement prevention means.
 13. A member-joiningdevice according to claim 12, wherein said inner member comprisesopposing walls, said first fixing portion is the first bridge memberwhich spans or intervenes between said opposing walls, said pipe membercomprises a pair of opposing walls, and said second fixing portion isthe second bridge member which spans or intervenes between said opposingwalls.
 14. A member-joining device according to claim 10, wherein saidfirst member and said second member are a square pipe.
 15. Amember-joining device according to claim 10, wherein the adjacent secondmembers are joined to each other through the first member, said firstmember comprises a slightly beveled pair of contact faces which arereversely and downwardly opposing, and an end face of said second memberis pressed to the contact face to connect said second member.
 16. Amember-joining device according to claim 10, wherein said first fixingportion is provided externally on said first member.
 17. Amember-joining device according to claim 16, wherein said first membercomprises a rail groove, and said first fixing portion is provided byengaging with said rail groove.
 18. A member joining device according toclaim 16 wherein said second fixing portion is provided on the slopecaved from the predetermined position of the second member.
 19. Amember-joining device according to claim 16, wherein said second fixingportion is formed by inserting a fixing member having a screwpenetrating a hole at an opening portion installed in the predeterminedposition of the second member.